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Liquipar Optima can be used in anhydrous formulations and again in both types of emulsions. Liquipar Optima needs the presence of oil to disperse properly hence its description as an oil soluble preservative. Liquipar Optima also seems to be a more stable preservation system as it is not destroyed by heat whereas care has to be taken with Germall not to add it at too high of a temperature.

Use at a rate of .5-1.0% and use no more than 1.0%

INCI: Phenoxyethanol (and) Methylparaben (and) Isopropylparaben (and) Isobutylparaben (and) Butylparaben